Burglar-alarm.



C. C. RANLETT.

BURGLAR ALARM. APPLICATION mp SEPT-22.1914.

Patented Apr; 18, 1916.

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CHARLES C. RANLETT, 10F OAKLAND, CALIFORNIA.

BURGLAR-ALARM.

risoaee.

. Specificationof Letters Patent.

Patented Apr. 18, 1916.

Application filed September 22, 1914. .Serial No. 863,044.

T 0 all whom it may concern:

Be it known that 1, CHARLES C. RANLE T, a citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented new and useful Improvements in Burglar-Alarms, of which the following is a specification.

My invention relates to burglar alarm devices of that class in which the alarm is attached to the window sash in such a manner that an attempt to raise the window will cause an explosion, intended to frighten the burglar and awaken the house inmates.

It consists in the combination of mecha: nism adapted to receive and retain a metallic cartridge a spring lever movable into or out of register with said cartridge, a movable stop which may be positioned to engage and release said lever, so as to discharge the cap, said stop being also movable out of register with the lever to allow the window to be normally opened and closed.

The invention also consists of the parts and the combination and construction of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which Figure 1 is a detail view of the device as applied. Fig. 2 is a plan View on line 2 2 of Fig. 1. Fig. 3 is a vertical transverse section on line 3% of Fig. 1. Fig. 4 is a vertical transverse section on line 44 of Fig. 1. Fig. 5 is a perspective view of the swinging latch.

I have shown my device as applied to an ordinary window having vertically sliding sashes upon the lower sash A of which is secured a support for the cartridge holder, and for the spring lever. This support 2 is provided with two extensions 34, these extensions projecting at right angles and away from the top of the lower sash rail to which the support is here shown as attached. The extension 3 has a perforation made in it adapted to receive a cartridge 5 which may be introduced from below, so that the flange of the cartridge is caused to abut against the underside of the extension. In order to retain the cartridge in place I have shown a swinging latch 6 pivoted to one side of the extension 3 and turnable so as to allow the cartridge to be first introduced into its position, then the latch when turned beneath the head of the cartridge will hold it in place. The latch is preferably stamped with ahole to register with the head of the form a channel 3 with which the edge of the latch engages when it is pushed into position beneath the cartridge. The latch is perforated as shown at 7, and this perforation stands in line with the head of the cartridge when the latch is closed, so as to allow the firing pin to pass through the perforation and strike the cartridge. The firing pin 8 is carried by a spring lever 9, which is fulcrumed to the support extension 4; the radius of movement of the lever being such that when it is swung outwardly and the latch 6 also swung outwardly, the cartridge may be introduced into the extension plate 3, the latch then closed in position beneath the extension plate and finally the swinging lever 9 is moved inwardly until the firing pin registers with the slot in the latch and rests upon the head of the cartridge. The parts are then in condition for operation.

The operation is effected by means of a stop 10, which projects from the side of the window casing toward the cartridge holder and the outer end of the spring lever 9 extends beneath this stop, so that when the window is raised, the spring lever will be bent downward until the end has passed the stop which releases the lever, allows it to violently return and the firing pin to strike the head of the cartridge and explode it. This stop is preferably mounted upon a swinging arm 11 pivoted to the window casing so that when turned outward the stop will stand at right angles with the easing and entirely clear of the spring lever so that the window may be raised and lowered for ordinary purposes without operating the spring lever and firing pin. This latch has its lower end notched as shown at 12, and adapted to engage with a latch pin 18 when the stop is in position to engage the firing pin spring, and this latch pin serves to hold the operating stop very rigidly in position when so located for actual use. To insure sufiicient impact to discharge the cartridge, a weight is attached to the spring'beneath the firing pin, and this insures a sufficiently powerful blow to explode the cartridge.

Having thus described my invention What I claim and desire to secure by Letters Patent is 1. In a burglar attachment of the character described, a perforated cartridge holding plate having a guide channel, a perforated latch lever, pivoted to swing in a plane beneath the plate and in said guide channel, an elastic lever carrying a firing pin and movable in a plane beneath the latch lever, into or out of register with the cartridge head, and a stop pivoted at one end upon the Window casing by Which the lever is retracted and released by the raising of the sash, said stop having a notch in its free end, and a pin in the casing With which the notch engages When the stop is in operative position.

2. In a burglar alarm, a member having a horizontal part apertured to receive a cartridge, a latch pivoted to and below said part and adapted to engage beneath the cartridge head, said part having a guide on its under face adapted to receive the free end of the latch, a spring element on the member having a firing pin, the latch being cutaway so as to receive the cartridge head, and enable the latch to fit snugly against the under face of said part, said latch being apertured, means on the latch engageable, with said part to enable manipulation of the latch and alsoto restrict the extent of movement of the latch to thereby bring the apertures of the latch and said part in register, and means to trip the spring element. In testimony whereof I have hereunto set my hand in the presence of two sub scribing Witnesses.

CHARLES C. RANLETT. Witnesses:

G. H. STRONG, W. W. HEALEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G." 

